Alright, let's solve this math problem step by step. First, we have the number 868. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 243. So, we're going to take the number 868 and add it to itself 243 times.
Step 1: 0 + 868 = 868
Step 2: 868 + 868 = 1736
Step 3: 1736 + 868 = 2604
Step 4: 2604 + 868 = 3472
Step 5: 3472 + 868 = 4340
Step 6: 4340 + 868 = 5208
Step 7: 5208 + 868 = 6076
Step 8: 6076 + 868 = 6944
Step 9: 6944 + 868 = 7812
Step 10: 7812 + 868 = 8680
Step 11: 8680 + 868 = 9548
Step 12: 9548 + 868 = 10416
Step 13: 10416 + 868 = 11284
Step 14: 11284 + 868 = 12152
Step 15: 12152 + 868 = 13020
Step 16: 13020 + 868 = 13888
Step 17: 13888 + 868 = 14756
Step 18: 14756 + 868 = 15624
Step 19: 15624 + 868 = 16492
Step 20: 16492 + 868 = 17360
Step 21: 17360 + 868 = 18228
Step 22: 18228 + 868 = 19096
Step 23: 19096 + 868 = 19964
Step 24: 19964 + 868 = 20832
Step 25: 20832 + 868 = 21700
Step 26: 21700 + 868 = 22568
Step 27: 22568 + 868 = 23436
Step 28: 23436 + 868 = 24304
Step 29: 24304 + 868 = 25172
Step 30: 25172 + 868 = 26040
Step 31: 26040 + 868 = 26908
Step 32: 26908 + 868 = 27776
Step 33: 27776 + 868 = 28644
Step 34: 28644 + 868 = 29512
Step 35: 29512 + 868 = 30380
Step 36: 30380 + 868 = 31248
Step 37: 31248 + 868 = 32116
Step 38: 32116 + 868 = 32984
Step 39: 32984 + 868 = 33852
Step 40: 33852 + 868 = 34720
Step 41: 34720 + 868 = 35588
Step 42: 35588 + 868 = 36456
Step 43: 36456 + 868 = 37324
Step 44: 37324 + 868 = 38192
Step 45: 38192 + 868 = 39060
Step 46: 39060 + 868 = 39928
Step 47: 39928 + 868 = 40796
Step 48: 40796 + 868 = 41664
Step 49: 41664 + 868 = 42532
Step 50: 42532 + 868 = 43400
Step 51: 43400 + 868 = 44268
Step 52: 44268 + 868 = 45136
Step 53: 45136 + 868 = 46004
Step 54: 46004 + 868 = 46872
Step 55: 46872 + 868 = 47740
Step 56: 47740 + 868 = 48608
Step 57: 48608 + 868 = 49476
Step 58: 49476 + 868 = 50344
Step 59: 50344 + 868 = 51212
Step 60: 51212 + 868 = 52080
Step 61: 52080 + 868 = 52948
Step 62: 52948 + 868 = 53816
Step 63: 53816 + 868 = 54684
Step 64: 54684 + 868 = 55552
Step 65: 55552 + 868 = 56420
Step 66: 56420 + 868 = 57288
Step 67: 57288 + 868 = 58156
Step 68: 58156 + 868 = 59024
Step 69: 59024 + 868 = 59892
Step 70: 59892 + 868 = 60760
Step 71: 60760 + 868 = 61628
Step 72: 61628 + 868 = 62496
Step 73: 62496 + 868 = 63364
Step 74: 63364 + 868 = 64232
Step 75: 64232 + 868 = 65100
Step 76: 65100 + 868 = 65968
Step 77: 65968 + 868 = 66836
Step 78: 66836 + 868 = 67704
Step 79: 67704 + 868 = 68572
Step 80: 68572 + 868 = 69440
Step 81: 69440 + 868 = 70308
Step 82: 70308 + 868 = 71176
Step 83: 71176 + 868 = 72044
Step 84: 72044 + 868 = 72912
Step 85: 72912 + 868 = 73780
Step 86: 73780 + 868 = 74648
Step 87: 74648 + 868 = 75516
Step 88: 75516 + 868 = 76384
Step 89: 76384 + 868 = 77252
Step 90: 77252 + 868 = 78120
Step 91: 78120 + 868 = 78988
Step 92: 78988 + 868 = 79856
Step 93: 79856 + 868 = 80724
Step 94: 80724 + 868 = 81592
Step 95: 81592 + 868 = 82460
Step 96: 82460 + 868 = 83328
Step 97: 83328 + 868 = 84196
Step 98: 84196 + 868 = 85064
Step 99: 85064 + 868 = 85932
Step 100: 85932 + 868 = 86800
Step 101: 86800 + 868 = 87668
Step 102: 87668 + 868 = 88536
Step 103: 88536 + 868 = 89404
Step 104: 89404 + 868 = 90272
Step 105: 90272 + 868 = 91140
Step 106: 91140 + 868 = 92008
Step 107: 92008 + 868 = 92876
Step 108: 92876 + 868 = 93744
Step 109: 93744 + 868 = 94612
Step 110: 94612 + 868 = 95480
Step 111: 95480 + 868 = 96348
Step 112: 96348 + 868 = 97216
Step 113: 97216 + 868 = 98084
Step 114: 98084 + 868 = 98952
Step 115: 98952 + 868 = 99820
Step 116: 99820 + 868 = 100688
Step 117: 100688 + 868 = 101556
Step 118: 101556 + 868 = 102424
Step 119: 102424 + 868 = 103292
Step 120: 103292 + 868 = 104160
Step 121: 104160 + 868 = 105028
Step 122: 105028 + 868 = 105896
Step 123: 105896 + 868 = 106764
Step 124: 106764 + 868 = 107632
Step 125: 107632 + 868 = 108500
Step 126: 108500 + 868 = 109368
Step 127: 109368 + 868 = 110236
Step 128: 110236 + 868 = 111104
Step 129: 111104 + 868 = 111972
Step 130: 111972 + 868 = 112840
Step 131: 112840 + 868 = 113708
Step 132: 113708 + 868 = 114576
Step 133: 114576 + 868 = 115444
Step 134: 115444 + 868 = 116312
Step 135: 116312 + 868 = 117180
Step 136: 117180 + 868 = 118048
Step 137: 118048 + 868 = 118916
Step 138: 118916 + 868 = 119784
Step 139: 119784 + 868 = 120652
Step 140: 120652 + 868 = 121520
Step 141: 121520 + 868 = 122388
Step 142: 122388 + 868 = 123256
Step 143: 123256 + 868 = 124124
Step 144: 124124 + 868 = 124992
Step 145: 124992 + 868 = 125860
Step 146: 125860 + 868 = 126728
Step 147: 126728 + 868 = 127596
Step 148: 127596 + 868 = 128464
Step 149: 128464 + 868 = 129332
Step 150: 129332 + 868 = 130200
Step 151: 130200 + 868 = 131068
Step 152: 131068 + 868 = 131936
Step 153: 131936 + 868 = 132804
Step 154: 132804 + 868 = 133672
Step 155: 133672 + 868 = 134540
Step 156: 134540 + 868 = 135408
Step 157: 135408 + 868 = 136276
Step 158: 136276 + 868 = 137144
Step 159: 137144 + 868 = 138012
Step 160: 138012 + 868 = 138880
Step 161: 138880 + 868 = 139748
Step 162: 139748 + 868 = 140616
Step 163: 140616 + 868 = 141484
Step 164: 141484 + 868 = 142352
Step 165: 142352 + 868 = 143220
Step 166: 143220 + 868 = 144088
Step 167: 144088 + 868 = 144956
Step 168: 144956 + 868 = 145824
Step 169: 145824 + 868 = 146692
Step 170: 146692 + 868 = 147560
Step 171: 147560 + 868 = 148428
Step 172: 148428 + 868 = 149296
Step 173: 149296 + 868 = 150164
Step 174: 150164 + 868 = 151032
Step 175: 151032 + 868 = 151900
Step 176: 151900 + 868 = 152768
Step 177: 152768 + 868 = 153636
Step 178: 153636 + 868 = 154504
Step 179: 154504 + 868 = 155372
Step 180: 155372 + 868 = 156240
Step 181: 156240 + 868 = 157108
Step 182: 157108 + 868 = 157976
Step 183: 157976 + 868 = 158844
Step 184: 158844 + 868 = 159712
Step 185: 159712 + 868 = 160580
Step 186: 160580 + 868 = 161448
Step 187: 161448 + 868 = 162316
Step 188: 162316 + 868 = 163184
Step 189: 163184 + 868 = 164052
Step 190: 164052 + 868 = 164920
Step 191: 164920 + 868 = 165788
Step 192: 165788 + 868 = 166656
Step 193: 166656 + 868 = 167524
Step 194: 167524 + 868 = 168392
Step 195: 168392 + 868 = 169260
Step 196: 169260 + 868 = 170128
Step 197: 170128 + 868 = 170996
Step 198: 170996 + 868 = 171864
Step 199: 171864 + 868 = 172732
Step 200: 172732 + 868 = 173600
Step 201: 173600 + 868 = 174468
Step 202: 174468 + 868 = 175336
Step 203: 175336 + 868 = 176204
Step 204: 176204 + 868 = 177072
Step 205: 177072 + 868 = 177940
Step 206: 177940 + 868 = 178808
Step 207: 178808 + 868 = 179676
Step 208: 179676 + 868 = 180544
Step 209: 180544 + 868 = 181412
Step 210: 181412 + 868 = 182280
Step 211: 182280 + 868 = 183148
Step 212: 183148 + 868 = 184016
Step 213: 184016 + 868 = 184884
Step 214: 184884 + 868 = 185752
Step 215: 185752 + 868 = 186620
Step 216: 186620 + 868 = 187488
Step 217: 187488 + 868 = 188356
Step 218: 188356 + 868 = 189224
Step 219: 189224 + 868 = 190092
Step 220: 190092 + 868 = 190960
Step 221: 190960 + 868 = 191828
Step 222: 191828 + 868 = 192696
Step 223: 192696 + 868 = 193564
Step 224: 193564 + 868 = 194432
Step 225: 194432 + 868 = 195300
Step 226: 195300 + 868 = 196168
Step 227: 196168 + 868 = 197036
Step 228: 197036 + 868 = 197904
Step 229: 197904 + 868 = 198772
Step 230: 198772 + 868 = 199640
Step 231: 199640 + 868 = 200508
Step 232: 200508 + 868 = 201376
Step 233: 201376 + 868 = 202244
Step 234: 202244 + 868 = 203112
Step 235: 203112 + 868 = 203980
Step 236: 203980 + 868 = 204848
Step 237: 204848 + 868 = 205716
Step 238: 205716 + 868 = 206584
Step 239: 206584 + 868 = 207452
Step 240: 207452 + 868 = 208320
Step 241: 208320 + 868 = 209188
Step 242: 209188 + 868 = 210056
Step 243: 210056 + 868 = 210924

So, 868*243 = 210924